Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner showing the new design;

FIG. 2 is a front view of the vacuum cleaner;

FIG. 3 is a rear view of the vacuum cleaner;

FIG. 4 is a right-side view of the vacuum cleaner;

FIG. 5 is a left-side view of the vacuum cleaner; and,

FIG. 6 is a top view of the vacuum cleaner.

The bottom of the vacuum cleaner forms no part of the claimed design.

The broken line showings of a button and of a cord are for the purpose of illustrating the article and form no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 